Taking creatine doesn't hurt your kidneys — studies show no difference in kidney or liver health markers between people who take creatine and those who don't.
See the scientific wording
Creatine supplementation does not impair renal function, as demonstrated by the absence of significant differences in renal and hepatic biomarkers—including urinary protein, creatinine clearance, glomerular filtration rate, and liver enzymes—between creatine and placebo groups across numerous clinical trials involving both healthy individuals and those with clinical conditions.
Very strong evidence
One moderate-quality study supports this claim, so treat this as an early signal rather than settled science.
What the research says
1 study reviewedSupporting (1)
Systematic Review With Meta-AnalysisMeta-analysis2025
The study looked at thousands of people taking creatine and found no more kidney problems than those taking a placebo, which supports the idea that creatine is safe for kidneys.
Contradicting (0)
No contradicting studies found yet
That doesn't mean it's settled — it just means no study has tested the opposite.
Quality-weighted scoring: we follow the GRADE framework — each study is rated High, Moderate, Low, or Very Low based on study design, methodology rigor, and risk of bias. A single high-quality RCT can outweigh several weaker observational studies.
Scores reflect study quality, not just count.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting study
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Taking creatine doesn't hurt your kidneys — studies show no difference in kidney or liver health markers between people who take creatine and those who don't.
Evidence from Studies
Supporting (1)
Community contributions welcome
Safety of creatine supplementation: analysis of the prevalence of reported side effects in clinical trials and adverse event reports
The study looked at thousands of people taking creatine and found no more kidney problems than those taking a placebo, which supports the idea that creatine is safe for kidneys.
Contradicting (0)
Community contributions welcome
Score Breakdown
No multi-axis breakdown available yet. The overall Pro / Against score above is the best signal.
- No clinical evidence is available; the score reflects mechanistic plausibility only.
What Would Prove This
Per GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this claim, ordered from strongest to weakest.
Systematic Review and Meta-Analysis of Randomized Controlled Trials on Creatine Supplementation and Renal Function in Healthy and Clinical Populations
Comprehensive review of RCTs comparing creatine vs. placebo, measuring changes in proteinuria, creatinine clearance, GFR, and liver enzymes over time in both healthy and clinical populations.
Double-Blind, Placebo-Controlled Trial of Long-Term Creatine Supplementation on Kidney and Liver Function in Healthy Adults
Randomized, double-blind trial assigning healthy and clinically stable participants to creatine or placebo for ≥12 weeks, with serial monitoring of renal and hepatic biomarkers.
Prospective Cohort Study of Recreational Athletes Using Creatine: Longitudinal Monitoring of Renal and Hepatic Function
Longitudinal follow-up of creatine users vs. non-users, tracking biomarker trends over months to years in a naturalistic setting.
Case-Control Study Comparing Prior Creatine Use in Patients with Acute Kidney Injury vs. Matched Controls
Compare history of creatine supplementation in patients with incident renal dysfunction versus healthy controls, adjusting for comorbidities and medication use.
National Survey-Based Cross-Sectional Study of Renal and Liver Biomarkers in Current Creatine Users vs. Non-Users
Analysis of nationally representative health survey data comparing lab values between current creatine users and non-users, controlling for age, sex, and health status.